Pharmacology NURS 251 Module
Exam () portage learning/
ABCnursing/Geneva College
Questions and Verified Answers, 100%
Guarantee Pass
MODULE 1: FOUNDATIONAL PHARMACOLOGY
Q1: What is the study or science of drugs called?
Answer: Pharmacology
Rationale: Pharmacology is the branch of medicine
concerned with the uses, effects, and modes of action of
drugs.
Q2: A patient reports dry mouth after starting a new
medication. This is an example of what type of drug effect?
Answer: Side effect
Rationale: A side effect is a predictable, secondary effect of a
medication that occurs at therapeutic doses. Dry mouth is a
common anticholinergic side effect of many medications.
Q3: Which term refers to the desired drug effect to alleviate a
condition or symptom?
Answer: Therapeutic effect
, Rationale: The therapeutic effect is the intended, beneficial
response to a medication that helps alleviate a patient's
condition or symptoms.
Q4: What is the difference between a side effect and an
adverse effect?
Answer: A side effect is a predictable, secondary effect (may
be harmless or harmful), while an adverse effect is a severe,
unintended, harmful reaction that may require intervention.
Rationale: Side effects are expected and often dose-related;
adverse effects are more severe, may be unexpected, and can
cause significant harm or require discontinuation of the drug.
Q5: List the four phases of pharmacokinetics in order.
Answer: Absorption, Distribution, Metabolism, Excretion
Rationale: Pharmacokinetics is the study of what the body
does to a drug. These four processes (ADME) determine the
drug's concentration in the body over time.
Q6: What is pharmacodynamics?
Answer: The study of what the drug does to the body—the
mechanism of action and the effects of drugs on the body.
Rationale: While pharmacokinetics describes drug
movement through the body, pharmacodynamics describes
the drug's effects and its mechanism of action at receptor
sites.
Q7: Define the term "agonist."
, Answer: A drug that binds to a receptor and activates it,
producing a response.
Rationale: Agonists mimic the body's endogenous
substances and produce a full or partial response at the
receptor site.
Q8: Define the term "antagonist."
Answer: A drug that binds to a receptor but does not
activate it, blocking the receptor and preventing other
substances from binding.
Rationale: Antagonists have no intrinsic activity but prevent
agonists from binding to and activating the receptor.
Q9: What is the difference between potency and efficacy?
Answer: Potency is the amount of drug needed to produce a
given effect (dose required), while efficacy is the maximum
effect a drug can produce regardless of dose.
Rationale: A highly potent drug requires a lower dose to
achieve an effect, but potency does not determine how
effective the drug is overall—efficacy does.
Q10: What is the therapeutic index?
Answer: The ratio between the toxic dose and the
therapeutic dose of a drug (TD50/ED50).
Rationale: A narrow therapeutic index means the drug has a
small margin of safety and requires careful monitoring (e.g.,
digoxin, warfarin, lithium).
Q11: What are the four main factors that can affect how
someone responds to a drug?
, Answer: Age, weight, sex, and genetic variation.
Rationale: These factors influence pharmacokinetics and
pharmacodynamics, altering drug absorption, distribution,
metabolism, excretion, and receptor sensitivity.
Q12: What is the difference between a generic name and a
trade (brand) name of a drug?
Answer: The generic name is the official, non-proprietary
name, while the trade name is the brand name given by the
manufacturer.
Rationale: Generic names are standardized and often reflect
the drug's chemical class, while trade names are proprietary
and marketed by specific companies.
Q13: What is a drug's half-life?
Answer: The time required for the concentration of a drug in
the body to decrease by 50%.
Rationale: Half-life determines dosing frequency—drugs
with short half-lives require more frequent dosing, while
drugs with long half-lives can be given less often.
Q14: Define "steady state" in pharmacokinetics.
Answer: The point at which the rate of drug administration
equals the rate of drug elimination, resulting in a relatively
constant drug concentration in the blood.
Rationale: Steady state is typically reached after
approximately 4-5 half-lives of the drug.
Q15: What is bioavailability?
Exam () portage learning/
ABCnursing/Geneva College
Questions and Verified Answers, 100%
Guarantee Pass
MODULE 1: FOUNDATIONAL PHARMACOLOGY
Q1: What is the study or science of drugs called?
Answer: Pharmacology
Rationale: Pharmacology is the branch of medicine
concerned with the uses, effects, and modes of action of
drugs.
Q2: A patient reports dry mouth after starting a new
medication. This is an example of what type of drug effect?
Answer: Side effect
Rationale: A side effect is a predictable, secondary effect of a
medication that occurs at therapeutic doses. Dry mouth is a
common anticholinergic side effect of many medications.
Q3: Which term refers to the desired drug effect to alleviate a
condition or symptom?
Answer: Therapeutic effect
, Rationale: The therapeutic effect is the intended, beneficial
response to a medication that helps alleviate a patient's
condition or symptoms.
Q4: What is the difference between a side effect and an
adverse effect?
Answer: A side effect is a predictable, secondary effect (may
be harmless or harmful), while an adverse effect is a severe,
unintended, harmful reaction that may require intervention.
Rationale: Side effects are expected and often dose-related;
adverse effects are more severe, may be unexpected, and can
cause significant harm or require discontinuation of the drug.
Q5: List the four phases of pharmacokinetics in order.
Answer: Absorption, Distribution, Metabolism, Excretion
Rationale: Pharmacokinetics is the study of what the body
does to a drug. These four processes (ADME) determine the
drug's concentration in the body over time.
Q6: What is pharmacodynamics?
Answer: The study of what the drug does to the body—the
mechanism of action and the effects of drugs on the body.
Rationale: While pharmacokinetics describes drug
movement through the body, pharmacodynamics describes
the drug's effects and its mechanism of action at receptor
sites.
Q7: Define the term "agonist."
, Answer: A drug that binds to a receptor and activates it,
producing a response.
Rationale: Agonists mimic the body's endogenous
substances and produce a full or partial response at the
receptor site.
Q8: Define the term "antagonist."
Answer: A drug that binds to a receptor but does not
activate it, blocking the receptor and preventing other
substances from binding.
Rationale: Antagonists have no intrinsic activity but prevent
agonists from binding to and activating the receptor.
Q9: What is the difference between potency and efficacy?
Answer: Potency is the amount of drug needed to produce a
given effect (dose required), while efficacy is the maximum
effect a drug can produce regardless of dose.
Rationale: A highly potent drug requires a lower dose to
achieve an effect, but potency does not determine how
effective the drug is overall—efficacy does.
Q10: What is the therapeutic index?
Answer: The ratio between the toxic dose and the
therapeutic dose of a drug (TD50/ED50).
Rationale: A narrow therapeutic index means the drug has a
small margin of safety and requires careful monitoring (e.g.,
digoxin, warfarin, lithium).
Q11: What are the four main factors that can affect how
someone responds to a drug?
, Answer: Age, weight, sex, and genetic variation.
Rationale: These factors influence pharmacokinetics and
pharmacodynamics, altering drug absorption, distribution,
metabolism, excretion, and receptor sensitivity.
Q12: What is the difference between a generic name and a
trade (brand) name of a drug?
Answer: The generic name is the official, non-proprietary
name, while the trade name is the brand name given by the
manufacturer.
Rationale: Generic names are standardized and often reflect
the drug's chemical class, while trade names are proprietary
and marketed by specific companies.
Q13: What is a drug's half-life?
Answer: The time required for the concentration of a drug in
the body to decrease by 50%.
Rationale: Half-life determines dosing frequency—drugs
with short half-lives require more frequent dosing, while
drugs with long half-lives can be given less often.
Q14: Define "steady state" in pharmacokinetics.
Answer: The point at which the rate of drug administration
equals the rate of drug elimination, resulting in a relatively
constant drug concentration in the blood.
Rationale: Steady state is typically reached after
approximately 4-5 half-lives of the drug.
Q15: What is bioavailability?
